Ask The Expert: Chris Palin Humiseal, Conformal Coating Materials on Key Conformal Coating Inspection Challenges

“The UV brightener used in conformal coatings can vary from different coating manufacturers. The variation is due to volume or type of brightener used. Generally speaking a high brightness UV tracer will  aid the automatic inspection system to identify that correct coating areas are covered and also look for stray material that may have entered critical keep out areas.”

“Some conformal coatings do not contain UV tracer and this is usually for a reason such as coating over LEDs or optical sensors where the UV tracer could affect light transmission. UV brighteners degrade over time with exposure to UV light therefore the coating on older PCBs may not show up quite as well depending on time and physical location of the board during its operational lifetime.”

Visit the Nexus Associate Experts Section and read what other experts have to say about conformal coating inspection.

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Author: nexus3c

A global resource for the Conformal Coating industry providing information, solutions, connections and advice on all areas of Conformal Coating including Conformal Coating Service, Equipment, Materials, Training, Documentation and Consultancy.

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